Adjustable shutter



Feb. 3. 1925. 1,525,346

A. J. WARREN ADJUSTABLE SHUTTER Filed June 8, 1925 2 Sheets-Sheet l Judie/r Jfirrerz INVENTOR WITNESS: A! T'ORNEY A. J. WARREN ADJUSTABLE SHUTTER Feb; 3. 1.925. 71,525,346

Filed June 8,' 1923 2 Sheets-Sheet 2 Jl irnerz/ INVENTOR ATTORNEY WITNESS:

Patented Feb. 3, 1925.

un rso STATES ANDREW J. WARREN, OF BEAUMONT, TEXAS.

ADJUSTABLE SHUTTER.

Application filed June 8,

To all whom it may concern:

Be it known that I, ANDREW J. WARREN, a citizen of the United States, residing at Beaumont, in the county of Jefferson and 5 State of Texas, have invented new and useful Im rovements in Adjustable Shutters, of whic the following is a specification.

This invention relates to shutter mecha-' nism for moving picture machines and the like, the eneral object of the invention being to adjust the openings in the shutter while the device is in motion.

This invention also consists in certain other features of construction and in the combination and arrangement of the several arts, to be hereinafter fully described, illiistrated in the accompanying drawings and s cifically pointed out in the appended .ifim. In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or correspondin parts throughout the several views, an in which Figure 1 is a rear view of the improved shutter with the parts in one osition.

Figure 2 is a similar viewwit the parts in another position.

Figure 3 is alongitudinal sectional view.

80 Figure 4 is an inner face view of one shutter member.

Fi re 5 is a similar view of the other mem r.

. Figure 6 is a view of the hub member 88 p with one of the shutter members partially shown.

Figures 7 and 8 are pre ective views of the rack bar carrying mem r and its operating fork.

Figure 9 is an end view of the su port for the manually operated screw shaf In these views 1 indicates the shaft of the 7 machine to which the shutter is applied and 2 indicates one of the bearin for said shaft. 4| A tubular shaft 3 is rotata 1y mounted on the shaft and said shaft 3 is rovided with a hub 4 which carries a num er of radiating stub shafts 5. The inner ends of these shafts have attached thereto the pinions 6 l0 and the outer ends the beveled gears 7. The

shutter A is compfised of two parts a and b which are rotata mounted on thetubular shaft 3, one on each side of the hub,

1923. Serial no. 644,180.

and these shutter parts have their hubs movably attached 'to the hub 4 by means of the olts 8 which pass through the arcshaped slots 9 in the shutter parts. Each shutter part is provided with a mutilated ring gear 10, these gears being engaged by the bevel gears 7 so that when the stub shafts 5 are rotated one shutter part will be moved in one direction and the other part in an opposite direction, the slots 9 permitting this movement. Thus the openings in the shutter can be adjusted to various sizes as the solid portions 11 of the shutter parts are moved relative to each other so as to increase or decrease the open- The pinions 6 are engaged by the rack bars 12 and these rack bars are carried by the grooved collar 13 which is slidably but non-rotatably mounted on the tubular shaft 3 by means of the key 14. The groove in the collar is engagpd b the fork 15 which has aninterior t rea ed tubular part 16 which is engaged by the screw shaft 17. This screw s a is mounted in a bracket 18 which is clamped to the bearing 2 and a disc 19 is fastened to the shaft between the parts of the bracket so that when the disc 19 is rotated by the fingers the shaft 17 will be rotated and thus the collar will be moved on the tubular shaft 3 and thus the rack bars will rotate the shafts 5 and thus cause the gears 7 to adjust the shutter parts by enga g the ring gears on said rom'the foregoing it will be seen that the shutter parts {can be adjusted while the shutter is in motion. This device will reduce flicker to a minimum and at the same time keep the light at the screen at its maximum strength. It is easy to install and simple to operate.

It is thought from the foregoin description that the advent and nove features of m invention will I readil apparent.

I esire it to be understood that I may make changes in the construction and in the combination and arrangement of the several parts, provided that such chan fall within the scope of the appended claim.

What I- claim is A device of the class described comprising a air of shutter parts, mutilated ring gears ereon, a tubular shaft on the shutter shaft, a hub on said tubular 'lar being slidably moiirited on the tubular shaft, arranged between the shutter parts, shaft, a manually operated screw shaft and 'stubvshafts carried by the hub, a pinion and a fork actuated by the same and engaging bevel gear on ean-h stub shaft, the bevelgears the groove in the collar. I

5 meshing with themutila ted gears, rack bars" In testimoiiy vhereof Ia'flix' my s ignattire.

engaging the pinions, a grooved cellar t0 i 7 which the rack bars are connected, said col- ANDREW J. WARREN. 

